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is the pre- stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The minimum stress on the beam subjected to a maximum bending moment is________________?

A. f = (P/A) – (Z/M)

B. f = (A/P) – (M/Z)

C. f = (P/A) – (M/Z)

D. f = (P/A) – (M/6Z)

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